Apparatus for hydrating lime.



M. H. AVBAM. APPARATUS FOR HYDRATING LIME.

APPLICATION FILED SEPT. 16. 1913.

Patented Oct. 19, 1915.

2 SHEETSSHEET 1.

6 MII- V4 warn/1 72 7562- 7 0 Ir J M. H. AVRAM. APPARATUS FOR HYDRATING LIME.

APPLICATION FILED SEPTA16, 1913.

2 SHEETS-SHEET 2.

Patented Oct. 19, 1915.

m N m wi/bweooeo M r 5 1? Mots H. AvnAM, or NEW YORK, N. Y., ASSIGNOR T0 STANDARD SILICA 33 1a; mncnmnnv eomrnnv, or WILMINGTON, DELAWARE.

APPARATUS FOR HYDRATING LIME.

Specification of Letters Patent. Patented Oct, 19, 1915.

Application filed September 16, 1918. Serial No. 790,011.

To all whom it may concern:

Be it known that I, Moi's H. AVRAM, a citizen of the United States, and a resident of New York city, Manhattan, county of New York, and State of New York, have invented a new and useful Apparatus for Hydrating Lime, of which the following is a specification.

This invention relates to a-novel apparatus for hydrating lime, in a quick, reliable and economic manner, the apparatus comprising essentially a barrel or drum which is so constructed that it may be readily paratus.

charged with unslaked lime, and that the hydrated lime may be quickly discharged from the drum while the latter is in rota-- tion. In this way any undue delay is avoided, while at the same time power is economized, as for starting the comparatively heavy filled drum, av motive power is required which is far in excess of that necessary during the normal operation of'the ap- The introduction of the lime into a rotating drum has the advantage that the charge is automatically and evenly distributed within the interior of the drum, thereby insuring uniform hydration. Furthermore, the discharge of the hydrated lime is.

accelerated, if the drum continues in its rotation particularly as effective means are provlded that cause said lime to slide toward the exit opening. The quick removal of the lime from the drum has another advantage in that the lime-has no time to cool before or while being discharged but is delivered at a high temperature, so that any condensation of moisture upon said lime is prevented,

and a perfectly dry product is obtained.

Inorder to maintain a high temperature within the drum during hydration, said drum is jacketed, it being provided with double walls between which an air space is formed, that serves as an insulator against the radiation of heat, so that the superheated steam introduced into or generated within the drum retains its state and does not become condensed. Before opening the barrel for emptying the same, this superheated steam, however, is admitted into the jacket so as to exteriorly heat the drum during the discharge of the hydrated lime.

Additional novel features of my improved A apparatus arebrought out inthe annexed tially a double-walled or jacketed drum A,

the inner wall 10 and outer Wall 11 of which taper toward the ends of said drum as illustrated in Figs. 1 and 2. Between walls 10 and 11, a heating chamber 12 is formed that communicates with the chambers 13 formed between the inner and outer end walls 14, 15, respectively, of the drum. To walls 14, 15 are secured a pair of trunnions 16, 17 rotatably mounted in bearings 18, 19. Drum A is provided with suitable means for rotating the same such as a gear wheel A which receives motion in any suitable manner. 1

Although the openings for introducin the un'slaked lime and for discharging the hydrated lime may be located at any convenient polnt of the drum, I prefer to feed the raw lime through one of the trunnions,

while the discharge of the hydrated lime' is effected through an opening formed in the side walls of the drum and arranged at or near the center thereof.

crusher C in which it is reduced to particles of small grain, say of *3,- to 1% of an inch diameter. As the weighing device and the crusher do not form part of the present invention, they are only diagrammatically shown in Fig. 1. The reduced lime is discharged from crusher G into a feed hopper 21, the lower end of which opens into a tapering central opening 22 of trunnion 16. Opening 22 is adapted to be closed by a conical valve 23 which is secured to a rota table and reciprocable, hollow spindle 24. The latter, passing through a correspond ing aperture of hopper 21, is journaled in a, stationary bearing 25 forming part of the machine frame. The outer end of spindle 24 passes through a stuffing box 26 and is received within a corresponding bore 27 'of a stationary cylinder 28. The latter communicates through a pipe 29 controlled by cock 30 with suitable steam or water supplying means 31. 1 These means may be of any suitable construction which permits a regulable quantity of moisture to be introduced into drum A through pipe 29, cylinder 28 and hollow' spindle 24.

.For opening and closing valve 23, spindle 24 is provided with a relatively fixed collar 32, a circumferential groove 33 of which is engaged by the pin 34 of a shipping lever 35. The latter is fulcrumed at 36 to a bracket 37 that also serves to support cylinder 28. To the free end of lever is pivoted a shipping rod 38 which may be intermittently reciprocated inany suitable manner.

It-will be readily understood that upon the opening of valve 23 the reduced lime discharged from crusher C will be fed into drum A. After the same has thus been charged with the desired quantity of lime, valve 23 is closed. The moisture necessary for hydrating the lime may be admitted into the drum during or subsequent to the introduction of the lime by properly manipulating cock 30. v

The trunnion 17 of the hydrating drum is provided with three longitudinal bores 39, 40 and 41 of which bore 39 communicates with the interior of drum A, while bores 40, 41 open into one of the end jackets or chambers 13. The outer end of bore 39 opens into a circumferential roove 42 of the outer re-' duced section43 o trunnion 17, said section being received'within the corresponding bore of a stationary block 44. Groove 42 communicate's with one leg of an inverted U- shaped duct 45 formed in block 44 and controlled by a cock 46. The other leg of duct 45 communicates With. a circumferential groove 47 formed in trunnion-section 43 and communicating with bore 40. A pipe 48 controlled by a cook 49 opens into duct 45 and serves for admitting live steam into said duct. Bore 41, opens into an annular groove 50 of section 43 which in turn communicates with a discharge pipe 51 controlled by a cook 52.

After-the lime has been completely hydrated, during which process thepressure within the. hydrating chamber 53 may be observed by a gage '54 connected to duct 45, cock 46 is opened to admit the superheated steam formed during the hydrating procss within chamber 53 into jacket 12, 13, the air previously contained. in said jacket being After the heat generated during the hydra tion of the lime has thus been advantageously employed for exteriorl heating the hydrating chamber 53, the liydrated lime is discharged by the following means: Drum A is provided with a peripheral discharge opening A controlled by a'conical valve or gate 56. The latter is securely attached to the inner end of a screw stem 57 loosely passing through a bearin 58. The latter forms part of a U-shaped rame which is secured to drum A by screws 59. Stem 57 is adapted to freely reciprocate within bearing 58 while its rotation therein is prevented by a groove and feather connection 60. Screw stem 57 is engaged by an internally threaded pinion 61 which is held against axial displacementvby a pair of relatively fixed keepers 62 engaging a corresponding groove of pinion 61., The latter is adapted to be engaged by either one of a pair of curved racks 63, 64, depending from a slide 65 which is reciprocally mounted in a fixed guide 66. To slide 65, there is pivoted at 67 a'shipping rod 68 which may be manipulated in any suitable manner. For discharging the hydrated lime, rod 68 is shifted toward the left (Fig. 2) so as to bring rack 64 into the path of pinion 61. The latter, while revolving with drum A, will thus engage rack 64 to be rotated. The diameter of pinion 61 and the length of rack 64 is such, that during a single engagement of the pinion with the rack, gate 56 is fully opened. After the pinion has cleared the rack, slide 65 is returned into its normal central position by correspondingly operating shipping rod 68, to permit a subsequent unimpeded passage of pinion 61 between racks 63,- 64. During the rotation of drum A, the hydrated lime is discharged through opening A into a suitable hopper 69 which conveys the product to the place desired. While thus discharging the lime, the drum is heated by the superheated steam admitted into jacket 12, 13 from the hydrating chamber, so that the lime retains its high temperature and any condensation of moisture upon the same is effectively revented. Should the steam admitted rom the hydrating chamber into the jacket be insuflicient for heating said'chamher during the discharge of the lime, live steam may be introduced into said jacket by opening cock 49, cock 46 having been prevlously closed. After all lime has been disthe path ofpinion 61 whereby gate 56'is returned into its ori l positlon to close opening A as will be may understood Cocks 49, 52 are now closed and valve 23 is opened to admit a fresh charge of un- "slaked lime into the hydrating chamber, whereupon the operation descrlbed is repeated.

I claim:

1. Apparatus for hydrating lime comprising a rotary drum, a surrounding jacket, means for introducing predetermined quantities of unslaked lime and-moisture into said drum, and means for conducting the steam generated during hydration from the drum .into the jacket.

2. Apparatus for hydrating lime comprising a rotary drum, a surrounding jacket, means for introducing predetermined quantities of unslaked lime and moisture into said drum, means for conducting the steam generated during hydration from the drum into the jacket, and means for subsequently discharging the hydrated lime from the drum.

3. Apparatus for hydrating lime comprising a rotary drum, a surrounding jacket, 2,

\ valve-controlled'duct connecting the interior of the drum with the jacket, and a valvecontrolled duct connecting said jacket with the atmosphere.

4. Apparatus for hydrating lime comprising a rotary drum, a surrounding jacket, a pair of trunnions at the ends of the drum, means for introducing unslaked lime and moisture through one of said trunnions, and means in the other trunnion for connecting the jacket with the interior of the drum and with the atmosphere.

5. Apparatus for hydrating lime comprising a rotary drum, a surrounding jacket,

means for introducing unslaked lime and 7. Apparatus for hydrating lime compris ing a rotary drum, a .trunnionat one end thereof and having a coniform opening, a rotatable hollow spindle centered within said opening, a valve carried by the spindle and adapted to close the opening, a cylinder embracing the outer end of the spindle to communicate with the cylinder, and means for reciprocating the spindle.

8. Apparatus for hydrating lime comprising a rotary drum, a trunmon at one end thereof and having a coniform opening, a feed hopper entering said opening, a hollow spindle centered within the opening, means for rotatably supporting the spindle, a valve carried by the spindle and adapted to close said opening, a cylinder embracing the outer 

